MetallurgyHard
Question
Consider the following statements :
S1 : In extraction of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace.
S2 : Calamine is an carbonate ore of zinc.
S3 : The principal ore of aluminium, bauxite, usually contains silica, iron oxides and titanium oxide as impurities.
S4 : Solidified copper obtained from silica lined convertor (Bessemer converter) has blistered appearance due to the evolution of SO2.
and arrange in the order of true/false.
S1 : In extraction of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace.
S2 : Calamine is an carbonate ore of zinc.
S3 : The principal ore of aluminium, bauxite, usually contains silica, iron oxides and titanium oxide as impurities.
S4 : Solidified copper obtained from silica lined convertor (Bessemer converter) has blistered appearance due to the evolution of SO2.
and arrange in the order of true/false.
Options
A.F T T T
B.F T F F
C.F F T T
D.T F F T
Solution
S1 : At 500 - 800 K (lower temperature range in the blast furnace)
3 Fe2O3 + CO → 2Fe3O4 + CO2
Fe3O4 + CO → 3Fe + 4 CO2
Fe2O3 + CO → 2FeO + CO2
At 900 - 1500 K (higher temperature range in the blast furnance) : FeO + CO → Fe + CO2
S2 : calamine is ZnCO3
S3 : It contains Fe2O3, SiO2 and TiO2 as impurities
S4 : The surface of solidified copper has blistered like appearances due to the evolution of SO2 and so it is called blister copper.
3 Fe2O3 + CO → 2Fe3O4 + CO2
Fe3O4 + CO → 3Fe + 4 CO2
Fe2O3 + CO → 2FeO + CO2
At 900 - 1500 K (higher temperature range in the blast furnance) : FeO + CO → Fe + CO2
S2 : calamine is ZnCO3
S3 : It contains Fe2O3, SiO2 and TiO2 as impurities
S4 : The surface of solidified copper has blistered like appearances due to the evolution of SO2 and so it is called blister copper.
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